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A method for directional control of pore size and graphitization of porous activated carbon materials and its application in lithium ion capacitors

A technology of porous activated carbon and porous carbon materials, applied in the application of the porous carbon materials in lithium ion capacitors, in the field of porous activated carbon materials, can solve the problems of dangerous preparation methods, complicated operations, and no reported capacitance behavior, etc., to achieve excellent electrochemical performance Performance, excellent performance, and the effect of promoting application development

Active Publication Date: 2021-04-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this preparation method is more dangerous and complicated to operate
In addition, there is no report to systematically study the pore size of porous carbon materials in LiPF 6 Capacitive Behavior of Electrolyte

Method used

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  • A method for directional control of pore size and graphitization of porous activated carbon materials and its application in lithium ion capacitors
  • A method for directional control of pore size and graphitization of porous activated carbon materials and its application in lithium ion capacitors
  • A method for directional control of pore size and graphitization of porous activated carbon materials and its application in lithium ion capacitors

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Experimental program
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Embodiment 1

[0044] 1. Preparation of materials

[0045] 1.1 MOFs precursors (Zn x co 100-x -ZIFs) preparation:

[0046] Monometallic ZIF-8(Zn 100- ZIF) and ZIF-67 (Co 100- ZIF) preparation: Zn(NO 3 ) 2 ·6H 2 O(3mmol,891mg) or Co(NO 3 ) 2 ·6H 2 O (3mmol, 873mg) were dissolved in 30mL methanol. Next, 2-methylimidazole (984 mg, 12 mmol) was dissolved in 30 mL of methanol, respectively. Subsequently, the organic ligand solution is rapidly added to the metal solution, and stirred while adding. After stirring for 15 minutes, the resulting solution was allowed to stand for 24 hours, and a precipitate of the product was able to separate out. Finally, the obtained product was washed several times with methanol, and dried under vacuum at 80° C. for 12 hours.

[0047] Preparation of bimetallic ZIFs: The preparation method of bimetallic ZIFs is very similar to the above-mentioned preparation method, except that the Zn(NO 3 ) 2 ·6H 2 O Co(NO 3 ) 2 ·6H 2 O ratio. Therefore, Zn 75 c...

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Abstract

The invention discloses a method for directional regulation and control of the aperture and graphitization of porous activated carbon materials and its application in lithium ion capacitors. The organic ligand is coordinated with zinc ions and cobalt ions to obtain a precursor; the precursor is calcined and pickled to obtain a porous carbon material; the porous carbon material is mixed with an activator for activation treatment, A porous activated carbon material is obtained; the pore size and graphitization of the porous activated carbon material are regulated by the molar ratio of zinc ions and cobalt ions, and a suitable pore size distribution can be obtained by adjusting the molar ratio of zinc ions and cobalt ions to about 90%:10%. And porous activated carbon materials with graphitization effect are used as positive electrodes to build high-performance lithium-ion capacitors.

Description

technical field [0001] The invention relates to a porous activated carbon material, in particular to a method for directional regulation and control of the pore size and graphitization of the porous activated carbon material, through which a porous activated carbon material with a suitable pore size and graphitization degree is synthesized, and also relates to the porous carbon The application of materials in lithium ion capacitors belongs to the technical field of preparation of electrochemical energy storage materials. Background technique [0002] Lithium-ion capacitors are composed of battery-type negative electrodes and capacitive positive electrodes. Due to their advantages of high energy density, high power density and long-term cycle stability, they have great application prospects in electric vehicles, medical equipment, national grids and aerospace fields. However, the energy density and power density of current lithium-ion capacitors have not yet reached the ideal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318C01B32/348H01G11/24H01G11/34H01G11/50
CPCC01B32/318C01B32/348H01G11/24H01G11/34H01G11/50Y02E60/13
Inventor 邹国强邹康宇纪效波侯红帅蔡鹏
Owner CENT SOUTH UNIV